CN107857395B - Condensate fine treatment regeneration wastewater ammonia recovery system - Google Patents
Condensate fine treatment regeneration wastewater ammonia recovery system Download PDFInfo
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- CN107857395B CN107857395B CN201711206527.XA CN201711206527A CN107857395B CN 107857395 B CN107857395 B CN 107857395B CN 201711206527 A CN201711206527 A CN 201711206527A CN 107857395 B CN107857395 B CN 107857395B
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- tank
- ammonia
- wastewater
- regeneration
- degassing membrane
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 239000002351 wastewater Substances 0.000 title claims abstract description 120
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 78
- 238000011069 regeneration method Methods 0.000 title claims abstract description 75
- 230000008929 regeneration Effects 0.000 title claims abstract description 72
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 239000012528 membrane Substances 0.000 claims abstract description 68
- 238000007872 degassing Methods 0.000 claims abstract description 60
- 239000002253 acid Substances 0.000 claims abstract description 38
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 37
- 238000010521 absorption reaction Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000011027 product recovery Methods 0.000 claims abstract description 17
- 239000006004 Quartz sand Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 238000005498 polishing Methods 0.000 claims description 49
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- 239000000047 product Substances 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 150000001768 cations Chemical class 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000012466 permeate Substances 0.000 claims description 4
- 230000001172 regenerating effect Effects 0.000 claims 7
- -1 ammonium ions Chemical class 0.000 abstract description 8
- 239000007789 gas Substances 0.000 abstract description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 9
- 235000019270 ammonium chloride Nutrition 0.000 description 4
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 4
- 235000011130 ammonium sulphate Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000010842 industrial wastewater Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/16—Halides of ammonium
- C01C1/164—Ammonium chloride
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
- C01C1/242—Preparation from ammonia and sulfuric acid or sulfur trioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/50—Inorganic acids
- B01D2251/502—Hydrochloric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/50—Inorganic acids
- B01D2251/506—Sulfuric acid
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physical Water Treatments (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
The invention discloses a condensate fine treatment regeneration wastewater ammonia recovery system which comprises a regeneration wastewater collection tank, a regeneration wastewater delivery pump, a regeneration wastewater collection tank stirrer, a filter backwash pump, a quartz sand filter, a precision filter, a heat exchanger, a degassing membrane device, a condensate fine treatment system neutralization tank, an acid storage tank, an acid metering pump, an ammonia absorption circulating tank, an ammonia absorption circulating pump, an ammonia product recovery tank, a degassing membrane cleaning system and a system pipeline valve. According to the invention, the pH value and the temperature of the regenerated wastewater are regulated (increased), so that the combination of ammonium ions and water in the regenerated wastewater is converted into the combination of ammonia and water, and the ammonia is recycled and absorbed by acid on the other side of the degassing membrane to recover ammonia in the wastewater by virtue of the characteristic that the degassing membrane only allows gas to pass, thereby effectively recycling the ammonia in the wastewater, and simultaneously reducing the emission and treatment cost of ammonia nitrogen in the wastewater.
Description
[ field of technology ]
The invention relates to the technical field of industrial water treatment, in particular to the technical field of an ammonia recovery system for wastewater of condensate polishing.
[ background Art ]
In a nuclear power conventional island condensate polishing system and a thermal power condensate polishing system, the condensate polishing system is used for removing the filtering and desalting effects of steam condensate generated by a steam turbine which is used for acting to drive a generator to generate power, mainly removing ammonia (ammonium ions) which is used for preventing equipment pipelines and the like from corroding and is added into the system for adjusting/improving the PH value of water, and the part of ammonia (ammonium ions) enters regeneration wastewater after regeneration.
The conventional and common treatment method for the regenerated wastewater of the condensate water fine treatment is to discharge the wastewater combination part of all condensate water fine treatment regeneration systems into a neutralization pond, discharge the wastewater into industrial wastewater for treatment after the PH adjustment is qualified, on one hand, the ammonia nitrogen content in the regenerated wastewater is very high, the difficulty of removing ammonia nitrogen is increased for the subsequent industrial wastewater, on the other hand, the operation cost of the industrial wastewater is increased due to the need of removing the ammonia nitrogen, the wastewater is not used for energy conservation and emission reduction, and the treated ammonia nitrogen cannot be recycled.
[ invention ]
The invention aims to solve the problems in the prior art, and provides an ammonia recovery system for wastewater regenerated by condensate polishing, which can recover ammonia (ammonium ions) in wastewater in the condensate polishing regeneration system and meet the requirements of industrial products (ammonium chloride or ammonium sulfate), thereby greatly reducing the emission of ammonia nitrogen in the wastewater regenerated by the condensate polishing system.
In order to achieve the above object, the present invention provides a condensate polishing regeneration wastewater ammonia recovery system, comprising a regeneration wastewater collection tank, a regeneration wastewater transfer pump, a regeneration wastewater collection tank stirrer, a filter backwash pump, a quartz sand filter, a precision filter, a heat exchanger, a degassing membrane device, a condensate polishing system neutralization tank, an acid storage tank, an acid metering pump, an ammonia absorption circulation tank, an ammonia absorption circulation pump, an ammonia product recovery tank, a degassing membrane cleaning system and a system pipeline valve, wherein the regeneration wastewater collection tank is provided with a cation resin regeneration tank and a condensate polishing alkali storage tank which are connected with the regeneration wastewater collection tank and are used for storing and replacing wastewater generated by the regeneration wastewater collection tank, the regeneration wastewater collection tank further comprises a first PH detector for detecting the PH value of the wastewater in the regeneration wastewater collection tank, the regeneration wastewater collection tank stirrer is arranged in the regeneration wastewater collection tank, the regeneration wastewater collection tank is connected with a regeneration wastewater delivery pump, the regeneration wastewater delivery pump is connected with a quartz sand filter for preventing impurities from entering the system, the quartz sand filter is connected with a precision filter for protecting the safety of a degassing membrane device, the precision filter is connected with a heat exchanger for controlling the temperature of the regeneration wastewater, the heat exchanger is connected with the degassing membrane device, the degassing membrane device comprises a plurality of membrane separators which only allow gas to pass through but not allow liquid to pass through, one side of the degassing membrane device which penetrates through the gas is also provided with an acid adding pipe, the degassing membrane device is connected with a condensate polishing system and a tank, a second PH detector for detecting the PH value of wastewater in the condensate polishing system and the tank is arranged in the condensate polishing system and the tank, the condensate polishing system and the tank is connected with an ammonia product recovery tank for storing recovered products, the ammonia product recovery tank is connected with the ammonia absorption circulating tank, the ammonia absorption circulating tank is connected with the acid storage tank, an acid metering pump is arranged between the ammonia absorption circulating tank and the acid storage tank, the acid metering pump and the ammonia absorption circulating tank are mutually matched to regulate and control the concentration of recovered products in the ammonia product recovery tank, and the ammonia product recovery tank is further connected with an ammonia absorption circulating pump for outputting the recovered products.
Preferably, the heating medium of the heat exchanger is steam or hot water, a water outlet of the heat exchanger is provided with a temperature detection sensor, and a bypass capable of replacing the heat exchanger to enable the system to normally operate is arranged on the heat exchanger.
Preferably, the degassing membrane device is connected to a degassing membrane cleaning system for cleaning the degassing membrane device.
Preferably, a neutralization tank acid adding pipe, a neutralization tank drain pipe, a neutralization tank alkali adding pipe and a neutralization tank stirrer are also arranged in the neutralization tank of the condensate polishing system.
Preferably, the number of the degassing membrane devices is one or more, the degassing membrane devices are connected in series or in parallel or in a series-parallel combination, and the number of the membrane separators is one or more.
Preferably, a first conveying pipe with a controllable switch is arranged on the regenerated wastewater conveying pump, the regenerated wastewater conveying pump is communicated with the condensate polishing system neutralization pond through the first conveying pipe, a second conveying pipe with a controllable switch is arranged on the filter backwash pump, and the filter backwash pump is communicated with the condensate polishing system neutralization pond through the second conveying pipe.
Preferably, the number of the system pipeline valves is two or more.
Preferably, hydrochloric acid or sulfuric acid is contained in the acid storage tank.
The invention has the beneficial effects that: according to the invention, the pH value and the temperature of the regenerated wastewater are regulated (increased), so that the combination of ammonium ions and water in the regenerated wastewater is converted into the combination of ammonia and water, and the ammonia is recycled and absorbed by acid on the other side of the degassing membrane to recover ammonia in the wastewater by virtue of the characteristic that the degassing membrane only allows gas to pass, thereby effectively recycling the ammonia in the wastewater, and simultaneously reducing the emission and treatment cost of ammonia nitrogen in the wastewater.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a condensate polishing regeneration wastewater ammonia recovery system of the present invention.
In the figure: 1-regeneration wastewater collection tank, 2-regeneration wastewater delivery pump, 3-regeneration wastewater collection tank stirrer, 4-filter backwash pump, 5-quartz sand filter, 6-precision filter, 7-heat exchanger, 8-degassing membrane device, 9-condensate polishing system neutralization tank, 10-acid storage tank, 11-acid metering pump, 12-ammonia absorption circulation tank, 13-ammonia absorption circulation pump, 14-ammonia product recovery tank, 15-degassing membrane cleaning system, 16-system pipeline valve, 1111-positive resin regeneration tank, 1112-first PH detector, 1113-condensate polishing alkali storage tank, 21-first delivery pipe, 41-second delivery pipe, 71-temperature detection sensor, 72-bypass, 81-membrane separator, 82-acid adding pipe, 91-second PH detector, 92-neutralization tank acid adding pipe, 93-neutralization tank drain pipe, 94-neutralization tank alkali adding pipe, 95-neutralization tank stirrer.
[ detailed description ] of the invention
Referring to fig. 1, the ammonia recovery system for condensate polishing regeneration wastewater of the present invention comprises a regeneration wastewater collection tank 1, a regeneration wastewater transfer pump 2, a regeneration wastewater collection tank stirrer (which may also be hydraulic circulation stirring) 3, a filter backwash pump 4, a quartz sand filter 5, a fine filter 6, a heat exchanger 7, a degassing membrane device 8, a condensate polishing system neutralization tank 9, an acid storage tank (hydrochloric acid or sulfuric acid) 10, an acid metering pump 11, an ammonia absorption circulation tank 12, an ammonia absorption circulation pump 13, an ammonia product (ammonium chloride or ammonium sulfate) recovery tank 14, a degassing membrane cleaning system 15 and a system pipeline valve 16, wherein the regeneration wastewater collection tank 1 is provided with a cation resin regeneration tank 1111 and a condensate polishing alkali storage tank 1113 which are connected with the regeneration wastewater collection tank 1 and are used for storing and replacing generated wastewater, the regeneration wastewater collection tank 1 further comprises a first PH detector 1112 for detecting the PH value of wastewater in the regeneration wastewater collection tank 1, the regeneration wastewater collection tank stirrer 3 is arranged in the regeneration wastewater collection tank 1, the regeneration wastewater collection tank stirrer 3 is capable of uniformly stirring the wastewater in the regeneration wastewater collection tank 1 and containing ammonia solution (primary alkali solution) and adjusting the required for one-time. The regenerated waste water collecting tank 1 is connected with a regenerated waste water conveying pump 2, and the regenerated waste water conveying pump 2 can be a submersible pump, a vertical self-priming pump, a horizontal self-priming pump, a long-shaft submerged pump or a vacuum water diversion cylinder and a centrifugal pump. The raw wastewater conveying pump 2 is connected with a quartz sand filter 5 for preventing impurities from entering the system, and the quartz sand filter 5 can be of a vertical container water cap porous plate structure or a vertical container quartz sand grading structure or a horizontal filter structure, and can also be of other filtering devices for pretreatment of the regenerated wastewater and meeting the water inlet requirements of a follow-up degassing membrane device. The quartz sand filter 5 is connected with a precise filter 6 for protecting the safety of the degassing membrane device 8, and the precise filter 6 can be a vertical wire-wound filter element structure or a vertical velvet spraying filter element structure or a vertical high-flow filter element structure or a horizontal high-flow filter element structure, and can also be a precise filter or a security filter in other forms. The precise filter 6 is connected with a heat exchanger 7 for controlling the temperature of the regenerated wastewater, the heating medium of the heat exchanger 7 can be steam or hot water, and can also be heating medium with other properties (comprehensively utilizing heat energy such as waste heat and the like), and the outlet temperature of the wastewater can be automatically adjusted according to the set outlet temperature of the wastewater of the heat exchanger. The heat exchanger 7 is connected with the degassing membrane device 8, the degassing membrane device 8 comprises a plurality of membrane separators 81 which only allow gas to pass through but not allow liquid to pass through, an acid adding pipe 82 is further arranged on one side of the degassing membrane device 8 which permeates gas, and hydrochloric acid or sulfuric acid is added through the acid adding pipe 82 to absorb and recycle ammonia gas on one side of the degassing membrane device 8 which permeates gas. The degassing membrane device 8 is connected with the condensate polishing system neutralization tank 9, and a second PH detector 91 for detecting the PH value of the wastewater in the condensate polishing system neutralization tank 9 is arranged in the condensate polishing system neutralization tank 9. The condensate polishing system neutralization tank 9 is connected with an ammonia product recovery tank 14 for storing recovered products, the ammonia product recovery tank 14 is connected with an ammonia absorption circulation tank 12, the ammonia absorption circulation tank 12 is connected with an acid storage tank 10, an acid metering pump 11 is arranged between the ammonia absorption circulation tank 12 and the acid storage tank 10, the acid metering pump 11 and the ammonia absorption circulation tank 12 are mutually matched, ammonia absorption efficiency and concentration of the ammonia recovered products are improved through repeated absorption in an acid liquor circulation mode, and the ammonia product recovery tank 14 is further connected with an ammonia absorption circulation pump 13 for outputting recovered products.
The heat medium of the heat exchanger 7 is steam or hot water, a temperature detection sensor 71 is arranged at a water outlet of the heat exchanger 7, a bypass 72 capable of replacing the heat exchanger 7 to enable the system to normally operate is arranged on the heat exchanger 7, and when the heat exchanger 7 needs cleaning, overhauling, maintaining or condensate polishing regeneration wastewater temperature meets the set temperature requirement, the operation of the system can be completed directly through the bypass.
The degassing membrane device 8 is connected with a degassing membrane cleaning system 15 for cleaning the degassing membrane device 8, and the degassing membrane cleaning system 15 is used for cleaning the degassing membrane device 8 when the recycling effect of the degassing membrane device 8 is reduced.
The neutralization tank 9 of the condensate polishing system is also provided with a neutralization tank acid adding pipe 92, a neutralization tank drain pipe 93, a neutralization tank alkali adding pipe 94 and a neutralization tank stirrer 95.
The number of the degassing membrane devices 8 is one or more, the connection mode of series connection or parallel connection or series-parallel connection is adopted among the degassing membrane devices 8 to achieve the best recovery effect, and the number of the membrane separators 81 is one or more.
The regeneration waste water delivery pump 2 is provided with a first delivery pipe 21 with a controllable switch, the regeneration waste water delivery pump 2 is communicated with the condensate polishing system neutralization pond 9 through the first delivery pipe 21, the filter backwash pump 4 is provided with a second delivery pipe 41 with a controllable switch, the filter backwash pump 4 is communicated with the condensate polishing system neutralization pond 9 through the second delivery pipe 41, and when the quartz sand filter 5 needs to backwash, the precise filter 6 needs to replace a filter element and the degassing membrane device 8 needs to be cleaned, the system can directly send waste water in the regeneration waste water collection pond 1 to the condensate polishing system neutralization pond 9 through the regeneration waste water delivery pump 2 or the filter backwash pump 4 by a bypass system. The number of system conduit valves 16 is two or more.
The working process of the invention comprises the following steps:
in the working process of the condensate fine treatment regeneration wastewater ammonia recovery system, the cation resin absorbing ammonium ions in condensate is regenerated and replaced in the cation resin regeneration tank 1111, the discharged water enters the regeneration wastewater collection tank 1 (other discharged water of the cation resin regeneration tank 1111 does not contain ammonium ions and does not enter the wastewater collection tank of the system, and is directly discharged into the condensate fine treatment system and the tank 9 or part of discharged water is separately recovered), and the volume of the regeneration wastewater collection tank 1 is enough to accommodate the water amount required by one or more times of regeneration and replacement of the cation resin, and a certain allowance is reserved when the water amount required by one time of regeneration and replacement of the cation resin is accommodated. The pH value is regulated (raised) by adding alkali into the regenerated waste water collecting tank 1 through the condensed water refined treatment alkali storage tank 1113, the ammonium ions, water and combination are converted into ammonia gas and water under the condition of high pH value, and meanwhile, the regenerated waste water collecting tank stirrer 3 in the regenerated waste water collecting tank 1 uniformly stirs the water in the tank.
The uniformly stirred regenerated wastewater is boosted by a regenerated wastewater conveying pump 2 from a regenerated wastewater collecting tank 1, sequentially passes through a quartz sand filter 5, a precise filter 6 and a heat exchanger 7 and then enters a degassing membrane device 8, and the purpose of the quartz sand filter 5 is to prevent impurities and the like from entering a subsequent system, so that the requirements of the degassing membrane device 8 are met; the purpose of the precise filter 6 is to protect the safety of the degassing membrane device 8, and the precise filter plays a role in protecting the safety of the degassing membrane device 8 when the previous system works abnormally; the heat exchanger 7 is arranged to raise the temperature of the regenerated waste water, and the ammonia water is utilized to produce more free ammonia gas, so that the temperature of the regenerated waste water is automatically controlled to prevent the degassing membrane device 8 from being damaged due to overhigh temperature.
The degassing membrane device 8 is provided with a membrane separator 81 which only allows gas to pass through but not liquid to pass through, and after passing through the degassing membrane device 8, the regenerated wastewater is discharged into a condensate fine treatment system neutralization tank 9; an acid adding pipe 82 is further arranged on one side of the degassing membrane device 8, hydrochloric acid or sulfuric acid is added through the acid adding pipe 82 to absorb and recycle ammonia on one side of the degassing membrane device 8, and the ammonia which permeates through the degassing membrane device 8 is quickly absorbed into recycled products (ammonium chloride or ammonium sulfate) through circulation of acid liquor (hydrochloric acid or sulfuric acid), wherein the circulation times are based on the concentration reaching the requirement of the products. Meanwhile, in order to ensure the full absorption of ammonia, the degassing membrane device 8 can be arranged in a serial or parallel or serial and parallel mode, and the ammonia can be absorbed for multiple times to achieve a good ammonia recovery effect. The recovered product (ammonium chloride or ammonium sulfate) having reached the recovery concentration is then transported to the ammonia product recovery tank 14 for storage, and the ammonia absorption cycle tank 12 is supplemented with an acid solution (hydrochloric acid or sulfuric acid) to continue the absorption of ammonia gas. The recovered product stored in the ammonia product recovery tank 14 may be periodically discharged from the system to a user or a transportation device through the ammonia absorption cycle pump 13.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (8)
1. The utility model provides a condensate polishing regeneration wastewater ammonia recovery system which characterized in that: comprises a regeneration wastewater collection tank (1), a regeneration wastewater delivery pump (2), a regeneration wastewater collection tank stirrer (3), a filter backwash pump (4), a quartz sand filter (5), a precision filter (6), a heat exchanger (7), a degassing membrane device (8), a condensate polishing system neutralization tank (9), an acid storage tank (10), an acid metering pump (11), an ammonia absorption circulation tank (12), an ammonia absorption circulation pump (13), an ammonia product recovery tank (14), a degassing membrane cleaning system (15) and a system pipeline valve (16), wherein the regeneration wastewater collection tank (1) is provided with a cation resin regeneration tank (1111) and a condensate polishing alkali storage tank (1113) which are connected with the regeneration wastewater collection tank (1) and used for storing regeneration and replacement generated wastewater, the regeneration wastewater collection tank (1) also comprises a first PH detector (1112) used for detecting the PH value of wastewater in the regeneration wastewater collection tank (1), the regeneration wastewater collection tank stirrer (3) is arranged in the regeneration wastewater collection tank (1), the regeneration wastewater collection tank (1) is connected with the regeneration wastewater delivery pump (2), the regeneration wastewater collection tank (1) is connected with the regeneration wastewater delivery pump (5) and the quartz sand filter (5) is prevented from entering the precision filter (8), the utility model provides a regeneration waste water temperature control's heat exchanger (7) is continuous with precision filter (6), heat exchanger (7) links to each other with degassing membrane device (8), degassing membrane device (8) are including a plurality of only allowing gas to pass through and not allowing membrane separator (81) that liquid passed through, degassing membrane device (8) permeate one side of gas still is equipped with add sour pipe (82), degassing membrane device (8) link to each other with condensate polishing system and pond (9), be equipped with in condensate polishing system and pond (9) and detect condensate polishing system and in pond (9) waste water PH value's second PH detector (91), condensate polishing system and pond (9) link to each other with ammonia product recovery tank (14) that are used for storing recovery product, ammonia product recovery tank (14) link to each other with ammonia absorption circulation tank (12), ammonia absorption circulation tank (12) link to each other with acid storage tank (10), be equipped with acid storage tank (11) between ammonia absorption circulation tank (12) and acid storage tank (10), ammonia product recovery tank (14) and ammonia product recovery pump (14) are recycled by the cooperation.
2. The ammonia recovery system for the condensate polishing and regenerating wastewater of claim 1, wherein: the heat medium of the heat exchanger (7) is steam or hot water, a temperature detection sensor (71) is arranged at a water outlet of the heat exchanger (7), and a bypass (72) capable of replacing the heat exchanger (7) to enable the system to normally operate is arranged on the heat exchanger (7).
3. The ammonia recovery system for the condensate polishing and regenerating wastewater of claim 1, wherein: the degassing membrane device (8) is connected with a degassing membrane cleaning system (15) for cleaning the degassing membrane device (8).
4. The ammonia recovery system for the condensate polishing and regenerating wastewater of claim 1, wherein: the neutralization tank (9) of the condensate polishing system is also provided with a neutralization tank acid adding pipe (92), a neutralization tank drain pipe (93), a neutralization tank alkali adding pipe (94) and a neutralization tank stirrer (95).
5. The ammonia recovery system for the condensate polishing and regenerating wastewater of claim 1, wherein: the number of the degassing membrane devices (8) is more than one, the connection modes of series connection or parallel connection or series-parallel connection combination are adopted among the degassing membrane devices (8), and the number of the membrane separators (81) is more than one.
6. The ammonia recovery system for the condensate polishing and regenerating wastewater of claim 1, wherein: the regeneration wastewater conveying pump (2) is provided with a first conveying pipe (21) with a controllable switch, the regeneration wastewater conveying pump (2) is communicated with the condensate polishing system neutralization pond (9) through the first conveying pipe (21), the filter backwash pump (4) is provided with a second conveying pipe (41) with a controllable switch, and the filter backwash pump (4) is communicated with the condensate polishing system neutralization pond (9) through the second conveying pipe (41).
7. The ammonia recovery system for the condensate polishing and regenerating wastewater of claim 1, wherein: the number of the system pipeline valves (16) is more than two.
8. The ammonia recovery system for the condensate polishing and regenerating wastewater of claim 1, wherein: hydrochloric acid or sulfuric acid is arranged in the acid storage tank (10).
Priority Applications (1)
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| CN110981775B (en) * | 2019-12-18 | 2021-12-14 | 山东益丰生化环保股份有限公司 | Method for removing ammonia in thiourea feed liquid |
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| JPH06182326A (en) * | 1992-12-17 | 1994-07-05 | Tohoku Electric Power Co Inc | Removing method for ammonium ion |
| JPH06182149A (en) * | 1992-12-17 | 1994-07-05 | Tohoku Electric Power Co Inc | Removal of ammonia from wastewater |
| CN103183393A (en) * | 2013-04-03 | 2013-07-03 | 江苏夏航环境工程有限公司 | Process for treating ammonia nitrogen wastewater by utilizing vacuum degassing membrane technology |
| CN103183431A (en) * | 2013-04-03 | 2013-07-03 | 江苏夏航环境工程有限公司 | Ammonia-nitrogen wastewater treatment technology |
| CN207619159U (en) * | 2017-11-27 | 2018-07-17 | 浙江海盐力源环保科技股份有限公司 | A kind of condensate polishing treatment regenerative wastewater ammonia recovery system |
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| JPH06182326A (en) * | 1992-12-17 | 1994-07-05 | Tohoku Electric Power Co Inc | Removing method for ammonium ion |
| JPH06182149A (en) * | 1992-12-17 | 1994-07-05 | Tohoku Electric Power Co Inc | Removal of ammonia from wastewater |
| CN103183393A (en) * | 2013-04-03 | 2013-07-03 | 江苏夏航环境工程有限公司 | Process for treating ammonia nitrogen wastewater by utilizing vacuum degassing membrane technology |
| CN103183431A (en) * | 2013-04-03 | 2013-07-03 | 江苏夏航环境工程有限公司 | Ammonia-nitrogen wastewater treatment technology |
| CN207619159U (en) * | 2017-11-27 | 2018-07-17 | 浙江海盐力源环保科技股份有限公司 | A kind of condensate polishing treatment regenerative wastewater ammonia recovery system |
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